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Wet the soil first, then test it if it's too dry. Don't test liquids with it. Used exclusively for soil testing. After three seconds, check the dial's temperature, light, humidity, and pH levels. Unsuitable for liquids, Never test any form of liquid with it.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.